windows下使用vscode开发C++程序遇到的一些问题

1. 连接库问题

   参考：https://blog.csdn.net/chaoren00001/article/details/104108133

   • 问题简述

     vscode下使用g++编译一个tobii眼动仪的例程，tasks.json配置无误，但是只能正常运行第一个例程，第二个例程报错undefined reference to ‘CLASS::METHOD’，无法解决

   • 解决方法

     • 按官网的方法，https://tobiitech.github.io/interaction-library-docs/cpp/html/gettingstarted.html，比较麻烦，需要命令行输入参数

       官网使用了cl.exe而不是g++来编译

     • 参考的方法，在tasks里设置了g++和cl.exe两个编译方式，可以在vscode的侧边栏进行选择

       • 我的tasks

         {
             "tasks": [
                 {	// 对应cl.exe
                     "type": "shell",
                     "label": "cl.exe build active file",
                     "command": "cl.exe",
                     "args": [	// cl的编译选项，自行设置
                         "/Zi",
                         "/EHsc",
                         "/MD",
                         "/I",
                         "include",
                         "/Fe:",
                         "${fileDirname}\\${fileBasenameNoExtension}.exe",
                         "${file}",
                         "/link",
                         "/libpath:lib\\x64",
                         "tobii_interaction_lib.lib",
                         "tobii_stream_engine.lib"
                     ],
                     "group": {
                         "kind": "build",
                         "isDefault": true
                     },
                     "presentation": {
                         "reveal": "always"
                     },
                     "problemMatcher": "$msCompile"
                 },
                 {	// 对应g++.exe
                     "type": "shell",
                     "label": "g++.exe build active file",
                     "command": "C:\\gytx_x86_64-10.2.0-posix-seh\\mingw64\\bin\\g++.exe",
                     "args": [	// g++的编译选项，自行设置
                         "-g",
                         "${file}",
                         "-o",
                         "${fileDirname}\\${fileBasenameNoExtension}.exe",
                         "-std=c++17",
                         "-Wall",
                         "-Weffc++",
                         "-Wextra",
                         "-pedantic",
                         "-I${workspaceFolder}\\include",
                         "-L${workspaceFolder}\\lib\\x64",
                         "-ltobii_interaction_lib",
                         "-ltobii_stream_engine"
                         
                     ],
                     "options": {
                         "cwd": "C:\\gytx_x86_64-10.2.0-posix-seh\\mingw64\\bin"		// 换成你自己的相应路径
                     }
                 }
             ],
             "version": "2.0.0"
         }
         

       • 我的launch.json

         {
             // 使用 IntelliSense 了解相关属性。 
             // 悬停以查看现有属性的描述。
             // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
             "version": "0.2.0",
             "configurations": [
                 {   // 对应cl.exe
                     "name": "cl.exe build and debug active file",
                     "type": "cppvsdbg",
                     "request": "launch",
                     "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
                     "args": [],
                     "stopAtEntry": false,
                     "cwd": "${workspaceFolder}",
                     "environment": [],
                     "externalConsole": true,
                     "preLaunchTask": "cl.exe build active file",
                     "logging": {	// 用于消除PDB文件找不到打不开问题，来自于https://none53.hatenablog.com/entry/2019/11/28/vsCode_Cannot_find_or_open_the_PDB_file.
                         "moduleLoad": false
                     }
                 },
                 {   // 对应g++.exe
                     "name": "g++.exe build and debug active file",
                     "type": "cppdbg",
                     "request": "launch",
                     "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
                     "args": [],
                     "stopAtEntry": false,
                     "cwd": "${workspaceFolder}",
                     "environment": [],
                     "externalConsole": true,
                     "MIMode": "gdb",
                     "miDebuggerPath": "C:\\gytx_x86_64-10.2.0-posix-seh\\mingw64\\bin\\gdb.exe",	// 换成你自己的gdb.exe的路径
                     "setupCommands": [
                         {
                             "description": "为 gdb 启用整齐打印",
                             "text": "-enable-pretty-printing",
                             "ignoreFailures": true
                         }
                     ],
                     "preLaunchTask": "g++.exe build active file"
                 }
             ]
         }
         

       • 工程结构

         ├─.vscode
         ├─bin
         │ └─x64
         ├─doc
         │ ├─c
         │ │ └─html
         │ ├─coordinate_systems
         │ │ └─html
         │ ├─cpp
         │ │ └─html
         │ ├─cs
         │ │ └─html
         │ ├─sdk
         │ │ └─html
         │ └─wpf
         │ └─html
         ├─include
         │ ├─DisplayEnumerationHelper
         │ ├─interaction_lib
         │ │ ├─api
         │ │ ├─datatypes
         │ │ ├─math
         │ │ └─misc
         │ └─tobii
         ├─lib
         │ └─x64
         └─samples
         ├─c
         ├─cpp
         ├─cs
         │ └─Properties
         └─wpf
         └─Tobii.InteractionLib.Wpf.SampleApp
         └─Properties

   • 未解决的问题

     • 要使用cl.exe，必须通过命令行打开vscode： 管理员模式打开x64 Native Tools Command Prompt for VS 2019, 输入code D:codes/test(这是我的工程路径)， 打开了vscode后正常运行